gps显示与文字跟踪

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/GPS显示
bool SuperMapGISCtrl::ShowGps( double longtitudeX, double latitudeY, CString gpsid, long iconNum, CString introduction )
{

CsoGeoPoint objGeoPoint;
CsoStyle objSty;

objSty.CreateDispatch( L"SuperMap.soStyle" );
objSty.SetSymbolStyle(m_BufferParam.GpsIcon);
objSty.SetSymbolSize(50);
objGeoPoint.CreateDispatch( L"SuperMap.soGeoPoint" );
objGeoPoint.Setx( longtitudeX );
objGeoPoint.Sety( latitudeY );

//car text
CsoTextPart objTextPart;
CsoGeoText objText;
objTextPart.CreateDispatch(L"SuperMap.soTextPart");
objText.CreateDispatch(L"SuperMap.soGeoText");

objTextPart.Setx( m_mapCtrl->PixelToMapX(m_mapCtrl->MapToPixelX(longtitudeX) + 10) );
objTextPart.Sety( m_mapCtrl->PixelToMapY(m_mapCtrl->MapToPixelY(latitudeY) + 10) );

objTextPart.SetText( gpsid );
objText.AddPart( objTextPart );
CsoTextStyle objTextStyle;
objTextStyle.CreateDispatch(L"SuperMap.soTextStyle");
objTextStyle.SetColor(RGB(44,44,250));

objTextStyle.SetFixedTextSize(35);

objTextStyle.SetFontHeight(50.00);
objTextStyle.SetFixedSize(TRUE);
objTextStyle.SetBold(TRUE);
objText.SetTextStyle((IsoTextStyle*)objTextStyle.m_lpDispatch);

m_trackingLayer.RemoveEvent(COleVariant(gpsid + L"gps"));
m_trackingLayer.RemoveEvent(COleVariant(gpsid));
if ( m_trackingLayer.AddEvent(objGeoPoint,objSty,gpsid + L"gps")
&& m_trackingLayer.AddEvent(objText,objSty,gpsid))
{
m_trackingLayer.RefreshEx();
}

objSty.ReleaseDispatch();
objGeoPoint.ReleaseDispatch();
return true;
}